• 
  Gary Trousdale

  regizor

• 
  Jon Lovitz

  Right Brain
• 
  Dana Carvey

  Right Ventricle
• 
  George Wendt

  Stomach
• 
  Corey Burton

  General Knowledge/Chicken/others
• 
  Kirk Wise

  Hypothalamus
• 
  Kenneth Kimmins

  Principal Herbert Hardcase
• 
  Charles Grodin

  Left Brain

• 
  Kevin Nealon

  Left Ventricle
• 
  Bobcat Goldthwait

  Adrenal Gland
• 
  Jeff Doucette

  Bladder